Latest filingAug 28, 2026Most recent Form 4
PTCT
PTC THERAPEUTICS, INC.
NasdaqHealthcarePharmaceutical Preparations
Insider activity for last month from 08/03 to 09/03. Counts use processed Form 4 rows. Purchase and sale metrics use codes P and S; totals remain unknown when any matching value is missing. Rows without a usable transaction date cannot be assigned to a rolling period and are excluded.
Total buying$00 buys
Total selling$381M11 sells
Net open-market-$381M2 insiders
Open-market mix
Buy vs sell distribution by transaction countInsider activity report
Monthly open-market purchase and sale counts Buys Sells
Transaction codes
By Form 4 transaction code in selected period13transactions
- S · Open-market sells · dominant11 · 85%
- M · Option exercise2 · 15%
Activity by reported role
A joint filing can contribute to multiple roles13transactions
- Director · dominant9 · 69%
- EVC4 · 31%
Distinct insiders active
Reporting-owner CIKs by month · peak Aug 2026 (2)Aug 2026Sep 2026
Reported Holdings After
Separated by insider, security, and ownership typeSchmertzler MichaelCommon Stock · Indirect · See footnote
1,336,594Aug 27, 2026
Boulding Mark ElliottCommon Stock · Direct
105,272Aug 17, 2026
Boulding Mark ElliottStock Option (Right to Buy) · Direct
16,876Aug 17, 2026
These are reported post-transaction holdings, not company-wide ownership percentages. Securities, indirect vehicles, and amendments are kept separate.
Filing activity heatmap
Each cell is one day · intensity = transactions · buys green, sells redAug 03 → Sep 03
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Top insiders
By absolute net value across the selected period- SM-$1.8M
- BE-$131.9k
Filing detail checks
Secondary metrics for the selected periodFiling-only signals
Deterministic matches in the selected period
PTCT transaction history
Filters apply within this company and selected period by default| Ticker | Insider | Role | Type | Shares | Value | Code | Signals | 90d return | Filed | Trans date |
|---|---|---|---|---|---|---|---|---|---|---|
| PTCT | SCHMERTZLER MICHAEL | DIR | sale10b5-1 | 691 | -$5.03M | S | +0.4% | 08/21 | 08/20 | |
| PTCT | SCHMERTZLER MICHAEL | DIR | sale10b5-1 | 2.39k | -$17.1M | S | +0.4% | 08/21 | 08/20 | |
| PTCT | SCHMERTZLER MICHAEL | DIR | sale10b5-1 | 9.41k | -$66.6M | S | +0.4% | 08/21 | 08/20 | |
| PTCT | SCHMERTZLER MICHAEL | DIR | sale10b5-1 | 7.16k | -$52.7M | S | +0.4% | 08/21 | 08/19 | |
| PTCT | SCHMERTZLER MICHAEL | DIR | sale10b5-1 | 5.33k | -$38.8M | S | +0.4% | 08/21 | 08/19 | |
| PTCT | Boulding Mark Elliott | EVC | exercise10b5-1 | 2.81k | $0 | M | −4.2% | 08/19 | 08/17 | |
| PTCT | Boulding Mark Elliott | EVC | sale10b5-1 | 969 | -$7.06M | S | −4.2% | 08/19 | 08/17 | |
| PTCT | Boulding Mark Elliott | EVC | sale10b5-1 | 1.84k | -$13.3M | S | −4.2% | 08/19 | 08/17 | |
| PTCT | Boulding Mark Elliott | EVC | exercise10b5-1 | 2.81k | $7.22M | M | −4.2% | 08/19 | 08/17 |
PTC THERAPEUTICS, INC. Insider Activity FAQ
SEC Form 4 contextWho recently reported transactions at PTC THERAPEUTICS, INC.?
SCHMERTZLER MICHAEL, Boulding Mark Elliott.
When was the latest reported open-market purchase?
No code-P purchase is available for this period.
When was the latest reported open-market sale?
Schmertzler Michael reported a sale on Aug 27, 2026 valued at $4.40M. Read the SEC filing.
What is the recent purchase and sale balance?
Net open-market selling in the selected period was $3,816,047.79. Sales can occur for many non-investment reasons.
Where can I see the original SEC filing?
Every transaction row and latest-activity fact links to its original SEC filing.
What do these Form 4 transaction codes mean?
P and S generally describe open-market or private purchases and sales. A, D, F, M, X, G, J, and V describe awards, issuer dispositions, tax withholding, exercises, gifts, other transactions, and voluntary early reports; review each filing and its footnotes for context.